Leopard features

Okay, so WWDC (WorldWide Developers Conference) is going to be held next week, Señior Jobs is going up in front of the world and unveiling his Leopard in it's complete entirety (we hope), so this means there are some features we are yet to see in this Operating System, anyone want to give a guess at what we haven't seen yet?

My bets are on some really cool Multi-touch things for the hardware that they are going to let into the wild at WWDC and possibly some better integration with iPhone/Apple TV with your desktop(s)